In a medium-sized bowl, combine the cherries with 1 tablespoon (13g) of sugar. Let stand 30 minutes, then drain the cherries, reserving the juice.
Preheat the oven to 375ºF (190ºC). Line a 12-serving muffin pan with tulip muffin liners.* (You can also use standard muffin liners. They hold less batter so they'll yield a couple of extra muffins.)
In a medium-sized bowl, whisk the flour, baking powder, baking soda and salt together until well blended.
In a large bowl, beat the butter, 1 cup (200g) of sugar and the lemon zest, with an electric mixer at medium speed, until pale and fluffy. Beat in the eggs, one at a time, until incorporated. Beat in the extracts. On low speed, mix in the flour mixture in 2 additions, followed by half of the sour cream after each addition. Beat just until combined. Do not over mix. Reserve a couple of tablespoons of the chopped cherries. Coat the remaining cherries with 2 teaspoons of flour, then gently fold them into the batter.
Divide the batter evenly into muffin liners. (If using standard muffin liners, fill 3/4 full.) Top with the reserved cherries and the crumb topping. Bake at 375ºF (190ºC) for 5 minutes. Turn the oven heat down to 350ºF (180ºC) and continue baking the muffins until a toothpick inserted into the centers comes out clean, about 12-17 more minutes. Do not over bake.
Transfer the muffins to a cooling rack to cool completely. Drizzle with icing and top with cherries if desired.